Hi there, im new in the world of SQL server so forgive my stupidness. Let me explain what they want: they want an installation of SQL server 2005 on a SQL server cluster with 2 nodes. This is for the preperation of some database applications such as Citrix, Softricity, Altiris and Powerfuse) They want an active/passive mode where the database and logfiles will be on a shared disk on a SAN. The SQL cluster will be build on Windows 2003. They say they want to install SQL server on the first node and that the second node will take over the installation (from what ive read this is wrong and u need to install it on the SCSI disk which has a share to the 2 nodes, is that right?) Since there is only 1 instance it needs to be set at active/passive since active/active needs 2 instances atleast. Data storage: SQL cluster needs storage for the Quorum disk, data disk and a logging disk. These will use a shared disk which will be used by the 2 nodes simulteanously. Because if its like this all changes in the masternode will be included so when a failover happens the slave node can acces all databases. Theoretically this shared disk are 2 seperate disks which will be on location and are locally connected to the nodes. The two disks will be kept synchronised because of the SAN that is connected with both locations. Is this about right what they want? Or is it not possible? Thanks for your answers in advance.